Volume 215, Issue 15 1701029
Original Paper

A Novel Modular Device for Biological Impedance Measurements: The Differential Impedimetric Sensor Cell (DISC)

Peter Cornelis

Corresponding Author

Peter Cornelis

KULeuven, Department of Physics and Astronomy, Soft-Matter Physics and Biophysics Section (ZMB), Celestijnenlaan 200 D, 3001 Leuven, Belgium

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Gideon Wackers

Gideon Wackers

KULeuven, Department of Physics and Astronomy, Soft-Matter Physics and Biophysics Section (ZMB), Celestijnenlaan 200 D, 3001 Leuven, Belgium

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Isabelle Thomas

Isabelle Thomas

University of Applied Sciences Kaiserslautern, Department of Informatics and Microsystem Technology, Amerikastr. 1, 66482 Zweibrücken, Germany

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Max Brand

Max Brand

University of Applied Sciences Kaiserslautern, Department of Informatics and Microsystem Technology, Amerikastr. 1, 66482 Zweibrücken, Germany

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Tristan Putzeys

Tristan Putzeys

KULeuven, Department of Physics and Astronomy, Soft-Matter Physics and Biophysics Section (ZMB), Celestijnenlaan 200 D, 3001 Leuven, Belgium

KULeuven, Department of Neurosciences, Research Group Experimental Oto-Rhino-Laryngology (ExpORL), O&N II Herestraat 49, 3000 Leuven, Belgium

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Alessia Gennaro

Alessia Gennaro

KULeuven, Department of Physics and Astronomy, Soft-Matter Physics and Biophysics Section (ZMB), Celestijnenlaan 200 D, 3001 Leuven, Belgium

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Michael Wübbenhorst

Michael Wübbenhorst

KULeuven, Department of Physics and Astronomy, Soft-Matter Physics and Biophysics Section (ZMB), Celestijnenlaan 200 D, 3001 Leuven, Belgium

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Sven Ingebrandt

Sven Ingebrandt

University of Applied Sciences Kaiserslautern, Department of Informatics and Microsystem Technology, Amerikastr. 1, 66482 Zweibrücken, Germany

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Patrick Wagner

Patrick Wagner

KULeuven, Department of Physics and Astronomy, Soft-Matter Physics and Biophysics Section (ZMB), Celestijnenlaan 200 D, 3001 Leuven, Belgium

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First published: 25 April 2018
Citations: 6

Abstract

For medical diagnostics, food-safety analysis, and detection of environmental pollutants, simultaneous detection and quantification of multiple target molecules can be a great advantage. Impedimetric measurements using molecularly imprinted polymers (MIPs), antibodies or aptamers as biomimetic sensors are becoming a well-established technique for detecting, quantifying, and analyzing various biological targets such as DNA, proteins, and small molecules. The most commonly implemented systems use non-Faradaic impedance spectroscopy. Adding a redox probe such as silver/silver chloride allows for the use of Faradaic impedance spectroscopy techniques using redox-active molecules such as ferricyanide thereby extending the range of possible applications. Furthermore, the ability to perform differential measurements allows for the use of undiluted patient samples which significantly simplifies sample preparation. Therefore, adapting this low-cost technique to simultaneously perform differential measurements on multiple targets and making it easy to use has great potential in a wide range of applications. In this work, a system that meets these requirements is successfully designed and fabricated. Up to eight different targets can be quasi-simultaneously analyzed. Furthermore, the system is validated against a high-resolution dielectric spectrometer (Novocontrol, Alpha analyzer) using well-characterized samples at different temperatures over the whole frequency range (10 Hz–100 kHz).

Conflict of Interest

The authors declare no conflict of interest.

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